The occasion was made all the more special by its spontaneity, with Madonna first promoting the free concert just days earlier. She tweeted out the location and other details just an hour before hitting the park.

Bitches Are You In My Gang??? Doing a surprise intimate very small acoustic concert Monday night in support of Hillary. Stay tuned! 🎉🎉🎉😂 pic.twitter.com/ZYf8X8aG1A

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